We have now reduced our Dirac–like equation (REF ) to (REF ): the exact form of the two dimensional Dirac equation [1]}. In the special case where \(m=\lambda \)  (analogous to the point where \(E=mc^2\)  for a relativistic particle), Eq. (REF ) implies that
\({e}\cdot {\nabla }a_1=0\) 
